Need Injen Short Ram MAF Scaling for GD WRX/STI

eSTeeaI · **Joined:** Mon Sep 21, 2015 9:09 pm **Posts:** 13

Hi guys,

Does anyone happen to have a MAF calibration for this intake? I'm e-tuning an 02 USDM WRX that's running an Injen short ram intake (part# IS1200P), but the owner does not have a WBO2 for OL MAF scaling. I looked around and had a hard time finding existing ROMs that used this intake. I did find one, but I'm not sure how reliable the calibatations were as it was an incomplete ROM.

The intake is "stock size" and the manufacturer claims it can be used with the factory maf scaling (yeah right!), but cruising and idle logs showed it running very lean.

Thanks guys!

jon7009 · **Posted:** Sat Nov 07, 2015 7:53 pm

It may not be the preferred method, but you can move the front o2 sensor directly behind the turbo (maybe his DP has a bung 6" from the turbo like many do) and if your minimum open loop is 11 or higher you can scale open loop that way. Directly behind the turbo you won't experience fuel trim swings in closed loop but if the sensor is in the mid-pipe it will.

eSTeeaI · **Joined:** Mon Sep 21, 2015 9:09 pm **Posts:** 13

Thanks, I thought of that as well, but I was under the impression the early GD O2 sensors had an even limited range? It seems like it won't go below 11.29 :/

jon7009 · **Posted:** Sun Nov 08, 2015 3:47 am

The table for the JDM SD rom has more values.

RomRaider

Need Injen Short Ram MAF Scaling for GD WRX/STI

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